The card has just been approved. Yahoooo~~
I have zero debt, no outstanding of credit card, no housing and car loan. All were provided by parents.
I normally request the bank to reduce my credit limit to 3 to 10K when I received my card because
I feel insecure to hold credit card with high credit limit.

Maybank 2 card platinum Visa = 3 K (reduced from 15 K)
CIMB World Mastercard = 10 K (reduced from 30 K)
Mach by Hong Leong Visa Signature  = 10 K (reduced from 20 K)
AmBank World Mastercard = 30 K (newly approved, will request to reduce the C.L. to 5 K upon receiving the card).
Public Bank Visa Signature = 30 K (newly approved, will request to reduce the C.L. to 5 K upon receiving the card).

My ideal total credit limit is 25 K for all cards.

Maybank - cancel it since no more attractive 5% cash back
CIMB - further reduce the C.L. to 5 K if allowed by the cs.
Mach - cancel it since the cs refuse to decrease further my C.L.
Ambank and Public bank - would try to request to reduce the C.L. to 5 K each.

Honestly speaking, I have no idea why many ppl opt to get a higher credit limit which expose yourself
to higher risk of credit card fraud case. Any advice?